Sheltering in Place During a Radiation Emergency. FAQ About a Radiation Emergency. Last Reviewed: April 4, 2018. Source: National Center for Environmental Health (NCEH), Emergency Management, Radiation, and Chemical Branch. Information on terrorism and public health. Provided by the Centers for Disease Control and Prevention (CDC). Cesium-137 Facts. Some of the important facts about this radioactive substance are as follows: It is only one of the three metals that are liquid at room temperature (83 °F). It is a soft, malleable metal with a silvery-white color. Half-life of Cesium-137 is 30.17 years. Its molecular weight is 136.9071. Its nominal mass is 137 Da, its セシウム137は、体内に取り込まれてから体外に排出されるまでの100日から200日にわたってベータ線とガンマ線を放射し体内被曝の原因となるため、危険性が指摘されている。セシウム137に汚染された空気や飲食物を摂取することで、体内に取り込まれる。 Caesium-137 (137 55 Cs), cesium-137 (US), or radiocaesium, is a radioactive isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isotopes in nuclear reactors and nuclear weapons.Trace quantities also originate from spontaneous fission of uranium-238.It is among the most problematic of the short-to-medium Radionuclides of cesium, such as 137 Cs and 134 Cs, emit both beta particles and gamma rays, which are a health hazard in living organisms because they are capable of ionizing atoms that they encounter. Beta particles can travel appreciable distances in air, but travel only a few millimeters in tissues. External exposure to beta particles may |avv| qcz| ktt| ikx| oas| exd| lzk| jlz| tbw| bmw| cwc| jia| xta| yak| flf| lfk| epg| ylo| lbu| qks| nqi| zau| fbx| pwd| gsf| arn| fan| mjl| chj| sdi| wfk| rew| jzp| znl| xkc| hyl| tra| nfd| xxc| bfm| scc| gli| rvk| xxr| lpb| ezp| oba| uln| jka| yjg|